Combined purifier and aspirator for middlings



April 24, 1928. 1,667,054

G. w. T. SEIFERT COMBINED PURIFIER AND ASPIRATOR FOR MIDDLINGS Filed June 2. 1927 s Sheets-Sheet 1 w is Q Q G. .ZlSezferZ Attorney April 24, 1928 1,667,054

G. w. T. SEIFERT COMBINED PURIFIER AND ASPIRATOR FOR MIDDLINGS Filed June 2, 1927 5 Sheets-Sheet 2 v Inwntor Attorngy April 24. 19,28. 7

G. W. T. SEIFERT COMBINED PURIFIER AND ASPIRATOR FOR MIDDLINGS Filed June 2. 1927 3 Sheets-Sheet 3 & Inventor G112]? 5 e17 Patented Apr .24, i

on Iran is Ajp'pl'icat-ion filed June 2,

The present invention relatestoimprovements in middlingpurifiers and has for its principal object to. provide; an improved structure functioning as a combinedpurifier and .aspirator.

Another very important object of the invention resides in the provision of a middling purifier having .itselementsand mem' bers so disposed that an air current aspirator is situated between .the shaker. sieve-and the feed roll wherebya large majorityof the impurities in the stock are taken out-before the stock reaches the sieve-thereby enabling; the-sieve to do better and more .workon ac-.

' count of the elimination of the majorportion of the impurities prior to the sieving OperatiOm'thereby simplifying and making more ellicient'the grading of theniiddlings; Another very important object of the in? vention residesin the provision of an improved middling purifier wherein theparts thereof are compactly and. conveniently ar ranged and the structure thereof islsimple,

thoroughly eflicient and reliable inoperation, not likely to easily get out of ordelg'and otherwise well adapted to the. purpose/for which it is designed, p

"W'th the above and numerous other .ob--

jectsin view as will appear. as t'he description proceeds, the invention resides vincertain novelfeatures of construction, and. in-

the'combination and arrangement 'ofQpartsas will be hereinafter'more fully-described andclaimed. i

In the drawing: I Figure 1 is a side elevation of the apparatus embodyingthe features of this inventhe latter.

tion,

taken through theapparatus substantially on. the line 44 of F igure'l looking in the di rection of the arrows,

F1gure5 is a vertlcal longitudinal section taken through theapparatus,

Refering to the drawings in detail it willoperable by a sprocket 33 on the outside of be seen that the numeral 5 denotes a framework in which is mounteda easing-compris ing a top wall'6, slde walls7 and 8, .a bot- Figure 2is another side elevationthereof PATENT o -"Pica. 7 7 i anon-en w. 'r. sErF'ER'r, or-came, Innnwnrs. I

commune rummlm AND asrmafron FOR urnnnmos.

1927. Serial 'No. 196,004.

wall 13 the upper portion of the latter inclining .upwa cated at 14. v v 1 flA stoclrentrance hopper. 15 extends i11- Wardly. and downwardly through the. top

rdly and inwardly as 'is indiwalls '6. immediately adjacent the wall 12 andhas al'eed roller 16 at thehot tom thereof fixed on ashaft 1 7 journaled in the side walls 7 and-8 and operated by a sprocket 18 adjacent theside wall 7 to the outer side thereof. A valve 19 is slidably. inountedin the hopper -15 to regulate the flow of stock therethrough; In Figure 5 the feed roller 16 rotates; in .a counter clock-wise direction and. delivers the stock to a feed board. 20 which. slants. downwardly from the feed roller ,16 toward the end wall 12terminating a slight distance from said end wall 12. A'second feed board 21 slants in substantial parallelism-with the feed board .20 andis disposed a distance therebelow. [A third feed board 22 slants in the same direction; with the feed board 21 but at a greater incline and is disposed therebelow. ,A feed board 23 extends inwardly and slants downwardly from the wall.12, immediately below the lower end of the feed hoard'22. An air op'ening24. is formed in the end wall 12 between the. feed boards 20and 21. A similar ai1' opening.25'is formed in thewall 12 between the feed. boards. 21 and 22 adjacent Hinged gates 26 and 27 are mounted in these open ings 24 and 25 respectively being hinged at the upper ends thereof as'is indicated at 28 and 29 respectively.

. These gates 26 and 27 open outwardly so.

that when open they incline downwardly and outwardly, .as is clearly illustrated in Figure 5 of the drawings. A trough 30 extends between the side walls? and 8 having a gate 31 on the side wall 8 for closing and opening the outlet. end. of the trough. An auger 32 is mounted in. thetrough 30 being side walls 7, said auger being constructed to urge material therein'toward the 'wall'8 and through the opening therein when the gate 31 is open. This trough 30 is disposed at substantially the same level as the opening 24. Feed boards 35 and 36 incline upwardly and outwardly from the trough 30 and are positioned and mounted between the side walls 7 and 8. The feed board 35 merges into the upper edge of the feed board 21. The feed board 36 is longer than the feed board 35 terminating in close proximity to the top wall 6 but sufficiently spaced therethrough so that a valve 37 may be pivotally mounted on its upper edge to regulate the passage between said upper edge and the top wall 6. i This valve 37 is operable through a crank 38 which is actuated by a pushrod 39 slidable through a bracket 40. This operating mechanism 38, 39 and 40 is mounted adjacent the side wall 7 on the exterior, thereof. A trough 41 is mounted between the side walls 7 and 8 and on the side wall 8 has an opening controlled by a gate 42. This trough 41 is at approximately the same level with the opening 25 and is approximately vertically alined with the trough 30. Feed boards 45 and 46 incline upwardly and. outwardly from the trough 41, the former merging into the upper edge of the feed board 32 and the latter being longer and extending under the feed board 36 terminating a distance therebelow and having pivotally mounted on its upper end a valve 47 which is operable in a similar manner to those valves 37, namely through crank 48, pushrod slidable in bracket 50, these operating parts being located in close proximity to the operating parts 38 to 40 inclusive. This valve 47 is to regulate the passage between feed boards 36! and 546.: The auger 41. is operated by a sprocket 43 to the outside of the side wall 7 and said auger is so constructed to urge material toward, the side wall 8. A shaker sieve 50 is mounted on spring rods 51 which are attached to the side walls 7 and 8 interiorly thereof. This shaker sieve 50 inclines downwardly from a. point immediately be low the lower edge of the feed board 23 and has a silk bottom 52 as is usually provided in such devices or may be of any other preferred construction. This shaker sieve is operable by a pitman 54 movable through an opening 55 in the end wall 12 and having an eccentric ring 56 at the outer end thereof for receiving an'eccentric 57 on a shaft 58 which is operable by a pulley 59. This shaft'58 is 'journaled in brackets 60. Im. mediately below the shaker sieve 50 there is disposed. an endless structure movable in a predetermined orbit that has its longitudinal dimension in parallelism or substantially so, with the shaker sieve 50. This mechanism comprises chains 61 trained over sprockets 62 on shafts 63 and 64, the latter being at a slightly lower level than the former. These shafts 63 and 64 are journaled through the side walls 7 and 8. The shaft 63 is operated by a pulley 66 and also has thereon adjacent the pulley a sprocket 67. A pair of angers 68 are mounted in the trough 9 and are separated by a partition 69. The trough leads to an opening 70 in the end wall 13 and the angers are rotated to urge the middlings toward this opening 7 through bevel gears 71 on the ends thereof which are journziled in the end wall 12. These bevel gears 71 mesh with bevel pinions 72 on a shaft 73 which is the drive shaft and is driven in any suitable manner. A trough 75 is mounted between the side walls 7 and 8 above the lower end of the shaker sieve 50 and has an auger 76 therein operable to urge stock toward the wall 8 through an opening therein closed by a gate 77. A valve 78 is hinged on the trough to be moved toward or. away from the wall portion 14 by means of crank 79 and pushrod 80 which is slidable through a bracket 81 on the side wall 7. The auger 76 is operated by a shaft 82 on which is mounted a pulley 83. A pulley 84 is mounted on the shaft 64 and a belt 85 is trained over the pulleys 83 and 84. v

A shaft 87 is journaled through the side walls 7 and 8 adjacent the end wall portion 14 but spaced therefrom and has spokes 88 extending therefrom for supporting paddles 89 to operate in an annular casing 90 to form a blower which has an opening 91 leading into an exhaust conduit 92 extending through the upper portion ofthe wall portion 14. This casing has central in take openings 93 and is thereforeof the centrifugal type creating a suction at the sides and center thereof and exhausting'out through the periphery tangentially thereof. Partitions 95, and 96 and a feed board 97 are disposed between the side walls 7 and 8 between the shaker sieve 50 and the blower just described, it being noted that said partitions and feed board extend from the periphery of openings 93 downwardly, the upper ends thereof being notched for the purpose of accommodating the casing 90. The feed board 97 extends upwardly from the inner side of the trough 75. A valve 99 is swingably mounted between i'eedboard 46 and partition for opening and closing thespace therebetween and is operable by a crank 100 and pushrod 108 slidable through a bracket 102 on the side wall 7. A valve 103 is swingably mounted between parti tions 95 and 96 to control the passage therebetween and is operable by crank 104 and pushrod 105 the latter being slidable by a bracket 106 on the side wall 7. A valve 107 is swingably mounted between partition 96 and feed board 97 and is controlled by a crank 108' and pushrod 109 slidable through a bracket 110 on the side wall 7. A brush 110 is mountedtransversely between the chains 61 as iselearly-shown in-Figun'e 4 and moves downwardly along the bottom surface of-thewsilk bottom .52vof'ithe shaker which are reversed as shown in Figure 2,-

this belt being trained over a pulley 116 of the shaft 87 for operating the blower so that the paddles 89 thereof move in a clock wise direction. A pulley 117 is mounted on the shaft 72 and a belt 118 is trained over this pulley 117 and over the pulley 66 for operating the shaft 62 and the endless chain structure which in turn causes the operation of the auger 76 through pulleys 83 and 84 and the belt 85 as previously indicated.

A chain 120 is trained over thesprockets 18 and 67 for causing operation of the feed roller 16. One run of this chain 120 is trained between sprockets and 43 for operating said sprockets and the augers 32 and 42 in the troughs 30 and 41 respectively. I

A cam. 122 is mounted on the shaft 17 to the outside of wall 8 and operates a rocker 123 which through a link 124 operates doors or gates 21 and 42 at the ends of the troughs 30 and 41 respectively. A cam 125 is mounted on the shaft 63 andoperates a push member 126 for opening the gate 77 at the end of the trough 75.

When the apparatus is operating as de-. scribed, it will be seen that the stock which is poured into the hopper 15 will be fed to the feed board 20 and gravitate past the opening 24 and acted upon by'the draft coming through opening 24 between feed boards 20 and 21 created by the blower and regulated by the valve 37 so that tailings will be drawn from the stock and the heavier tailings will settle in the trough 30 to be ejected and the lighter dust tailings will be drawn through the side openings 93 and ejected through the outlet conduit 92. The feed will continue down and gravitatepast the opening 25 and be acted upon by air currents between the second passage formed by the feed boards and the heavier tailings will settle in the trough 41 and be ejected as is apparent, while the lighter tailings and dust will continue by the draft through the space between feed boards 36 and 46 and controlled by valve 47 and delivered to the blower and through the outlet conduit 92.

The stock'passes downwardly across the feed board 23 to be delivered in a comparatively clean condition to the shaker sieve 50 -99 and 103 and 107.

so that the imiiddlings will 1 be si fted th'rough the-silk. "bottmn and -ibrushes therefrom are created between the feed bmndf42and partitionfio and between 'partition'fiii and partition 96 and between partition 96 and feed board 97 to act upon the stock in the shaker sieve and draw up dust and impurities to the blower to be ejected thereby and,

these drafts are controlled by the valves A draft also sucks up the light impurities from thevlower end of the sieve shaker, this latter draft being controlled by the'valve 78 and the heavier tailings will settle into the trough and be ejected while the lighter particles will pass up between the feed board 97 and the wall portion 14 through the blower and be ejected thereby.

From the. above detailed description it will be seen that there is provided an air current aspirator between the shaker sieve 50 and the feed roll 16. This arrangement will separate approximately 80% of the impurities which is in the stock before the stock reaches the sieve which will enable the sieve to do better and more work on account of all impurities being eliminated from the stock before entering the sieve and leaving the stock in a condition simply to be graded still having a strong air current on the silkon the shaker sieve, and 80% of those impurities before they reach the blower or fan, and grading those impurities in four grades of stock. The location of the blower or fan enables this apparatus to obtain a very strong current of'air through the silk on account of the close connection possible.

It is thought that the construction, operation, and advantages of this apparatus will now be quite apparent to those skilled in this art without a more detailed description thereof. The present embodiment of the invention has been disclosed in detail merely by brush '110:torbe.deliveredto augers '68 in "the 9 and ejected through the opening 70. It will be ented that atedias desirable in the statement of the invention and the above description. It will be apparent that changes in the details of construction, and in the combination and arrangement .of parts may be resorted to without departing from the spirit or scope of the invention as hereinafter claimed or sacrificing any of itsiadvantages.

Having thus described my invention, what I claim as new is i i In a middlings purifier, a casing comprising a top wall, end walls, side walls, and a bottom. longitudinal trough, a sieve longitudinally arranged in the casing immediately above the trough, a feed hopper in the top of the casing adjacent one end wall for the purpose of gravitating materialto the sieve said one end wall being provided With a pair of openings one above the other, means for forming air currentways leadilig from the openings longitudinally along the top of the casing, conveyor means transversely across said Ways, ablower for creating air current in said Ways, partitions in the casing rising upwardly from the sieve adjacent the other end of the casing to provide upright airways, the current in said upright airways being created by said current creating means.

In testimony whereof I aflix my signature GEORGE WV; T. SEIFERT. 

